Composition of matter for battery-electrolytes.



UNTTED STATES Patented August 11, 1903.

PATENT OFFICE. a

ENGLAND.

COMPOSITION OF MATTER FOR BATTERY-ELECTROLYTES.

SPECIFICATION forming part of Letters Patent No. 735,808, dated August11, 1903. Application filed March 14, 1903. Serial No. 147,761- (Nospecimens.)

To all whom, it may concern.-

Be it known that we, WILLIAM PETO and JAMES WILLIAM THOMAS CADETT, bothsubjects of the King of Great Britain and both residing at Ashlead, inthe county of Surrey, England, haveinvented anew and usefulcompositionof matter to be used as a plastic or semisolid electrolyte for electricaccumulators in lieu of the liquid electrolyte at present in use,whereby such accumulators are rendered more efficient and convenient andthe risk of spilling the electrolyte is greatly minimized.

The following is a specification of such new and useful composition ofmatter.

Our composition consists of powdered or precipitated sulfate of leadmoistened with dilute sulfuric acid of about the average strength usedin electric accumulators, which ingredients are combined in about thefollowing proportions, viz: finely-precipitated sulfate of lead, onepound; dilute sulfuric acid of about specific gravity 1.2, four ounces.These ingredients are thoroughly mixed together either by hand ormechanically until they form a soft plastic mass of a paste-likeconsistency.

The proportions stated above are subject to some variation, according tothe quality of the sulfate of lead, as some descriptions of sulfate oflead take up more acid than others,

while the strength of the acid is varied within ordinary limits,according to the purpose for which the accumulators are to be used. Therequisite proportion of acid can be easily regulated by allowing themixture to stand awhile, when any excess of acid will rise and float onthe top and can then be poured off. Sufficient acid must, however, beused to render the composition soft and plastic, as if it be made toostilt the gasing of the accnmulator may produce air-spaces therein thatmay impair the efficiency of the accumulator.

What we claim, and desire to secure by Letters Patent of the UnitedStates, is-- As asemisolid plastic electrolyte of a pastelikeconsistency for electric accumulators a composition of matter consistingof powdered or precipitated sulfate of lead moistened with dilutesulfuric acid and thoroughly mixed together, the strength of the acidbeing varied within ordinary limit-s according to the purpose for whichthe accumulator or accumulators is or are to be used, while the exactproportions of the ingredients are regulated by the quality of thesulfate of lead employed all substantially as hereinbefore specified.

WILLIAM PETO. JAMES WILLIAM THOMAS CADETT.

Witnesses:

Aces. SHIRLEY BOWDEN, RENE BowDEN.

